Figure 11

Tracking temperatures in real-time, and comparison with tilt data. In fall of 2012, inflation at Pu‘u ‘Ō‘ō peaked in late October. As the cone inflated, several episodes of lava effusion onto the crater floor occurred, presumably due to increased pressure within the shallow magma reservoir. a-d) Corresponding visual webcam and thermal (PTcam) images at two times during this period. The thermal images cover only about the left half of the field of view of the visual images. e) Automated product from Script L2, showing the percentage of the PTcam image that is >200°C. This time series is very effective at highlighting effusive events. f) Radial ground tilt from the POC tiltmeter (see Figure 1d for tiltmeter location). The thermal images have not been corrected for atmospheric or volcanic gas effects, and actual surface temperatures may be higher than the apparent temperatures shown here.